In this article:

Sleep is at once highly familiar—we all do it—and deeply mysterious; among those studying the science of sleep, there is no consensus on why it evolved in the first place (Assefa et al., 2015).
Fortunately, in recent decades, the science of sleep has moved forward. New technologies have allowed scientists to study the changes that take place in the brain and body during sleep, revealing more of what happens and why.
Read on to learn more about these research findings and how to use it to improve sleep.
Before you continue, we thought you might like to download our three Positive Psychology Exercises for free. These science-based exercises will explore fundamental aspects of positive psychology including strengths, values, and self-compassion, and will give you the tools to enhance the wellbeing of your clients, students, or employees.

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